1/* 2 * smp.h: PowerPC-specific SMP code. 3 * 4 * Original was a copy of sparc smp.h. Now heavily modified 5 * for PPC. 6 * 7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) 8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 */ 15 16#ifndef _ASM_POWERPC_SMP_H 17#define _ASM_POWERPC_SMP_H 18#ifdef __KERNEL__ 19 20#include <linux/threads.h> 21#include <linux/cpumask.h> 22#include <linux/kernel.h> 23 24#ifndef __ASSEMBLY__ 25 26#ifdef CONFIG_PPC64 27#include <asm/paca.h> 28#endif 29 30extern int boot_cpuid; 31 32extern void cpu_die(void); 33 34#ifdef CONFIG_SMP 35 36extern void smp_send_debugger_break(int cpu); 37extern void smp_message_recv(int); 38 39#ifdef CONFIG_HOTPLUG_CPU 40extern void fixup_irqs(cpumask_t map); 41int generic_cpu_disable(void); 42int generic_cpu_enable(unsigned int cpu); 43void generic_cpu_die(unsigned int cpu); 44void generic_mach_cpu_die(void); 45#endif 46 47#ifdef CONFIG_PPC64 48#define raw_smp_processor_id() (get_paca()->paca_index) 49#define hard_smp_processor_id() (get_paca()->hw_cpu_id) 50#else 51/* 32-bit */ 52extern int smp_hw_index[]; 53 54#define raw_smp_processor_id() (current_thread_info()->cpu) 55#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) 56#define get_hard_smp_processor_id(cpu) (smp_hw_index[(cpu)]) 57#define set_hard_smp_processor_id(cpu, phys)\ 58 (smp_hw_index[(cpu)] = (phys)) 59#endif 60 61extern cpumask_t cpu_sibling_map[NR_CPUS]; 62 63/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. 64 * 65 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up 66 * in /proc/interrupts will be wrong!!! --Troy */ 67#define PPC_MSG_CALL_FUNCTION 0 68#define PPC_MSG_RESCHEDULE 1 69/* This is unused now */ 70#define PPC_MSG_DEBUGGER_BREAK 3 71 72void smp_init_iSeries(void); 73void smp_init_pSeries(void); 74void smp_init_cell(void); 75void smp_init_celleb(void); 76void smp_setup_cpu_maps(void); 77 78extern int __cpu_disable(void); 79extern void __cpu_die(unsigned int cpu); 80 81#else 82/* for UP */ 83#define hard_smp_processor_id() 0 84#define smp_setup_cpu_maps() 85 86#endif /* CONFIG_SMP */ 87 88#ifdef CONFIG_PPC64 89#define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id) 90#define set_hard_smp_processor_id(CPU, VAL) \ 91 do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0) 92 93extern void smp_release_cpus(void); 94 95#else 96/* 32-bit */ 97#ifndef CONFIG_SMP 98extern int boot_cpuid_phys; 99#define get_hard_smp_processor_id(cpu) boot_cpuid_phys 100#define set_hard_smp_processor_id(cpu, phys) 101#endif 102#endif 103 104extern int smt_enabled_at_boot; 105 106extern int smp_mpic_probe(void); 107extern void smp_mpic_setup_cpu(int cpu); 108extern void smp_generic_kick_cpu(int nr); 109 110extern void smp_generic_give_timebase(void); 111extern void smp_generic_take_timebase(void); 112 113extern struct smp_ops_t *smp_ops; 114 115#endif /* __ASSEMBLY__ */ 116 117#endif /* __KERNEL__ */ 118#endif /* _ASM_POWERPC_SMP_H) */ 119